96.2% of all mass shootings between January of 1998 and December of 2015 have taken place in so-called “gun free zones,” where public and private entities forbade the open and/or concealed carry of firearms. Almost all of them have passed without anyone suing to hold the site of the mass shooting responsible for poor security. That has now changed.

Victims of the November attack at the Colorado Springs Planned Parenthood have filed a lawsuit against the clinic and its parent company alleging that the shooting was both predictable and preventable.

The lawsuit, which was filed in Denver District Court on Friday, alleges that given the long history of violent acts and threats at clinics, Planned Parenthood should have known that an attack was likely at the Colorado Springs facility. Given that knowledge, Planned Parenthood failed to provide adequate security and did not alert people at the clinic that they were at “risk of injury or death.”

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Planned Parenthood failed to have an armed security guard at the clinic at the time of the shooting, according to the lawsuit. The clinic also did not have adequate fencing or secured entry points, failed to train employees and did not provide video monitoring of areas at the clinic.

Some Planned Parenthood facilities provide better security than others, the complaint said. [plaintiffs’ attorney Kirk] McCormick used the Denver clinic — which has wrought-iron fences — as an example.

Planned Parenthood “should have known of the consequences of their delay, failure and decision to not implement appropriate security measures to protect the Plaintiffs and their families,” the complaint said.

This will be a very interesting case to watch, as it argues that Planned Parenthood’s long history of being a target for violence makes it culpable for providing both much more robust security at the site, and warnings to clients that merely visiting one of the facilities substantially increases their likelihood of being attacked.

If the suit is successful, it would seem to open the floodgates to lawsuits anytime that there was a gun-free zone attacked that wasn’t equipped with armed guards, controlled access points, and other security measures.